50216561 has 8 divisors (see below), whose sum is σ = 51543360. Its totient is φ = 48897072.

The previous prime is 50216557. The next prime is 50216591. The reversal of 50216561 is 16561205.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50216561 - 2² = 50216557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50216561.

It is not an unprimeable number, because it can be changed into a prime (50216501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13811 + ... + 17063.

It is an arithmetic number, because the mean of its divisors is an integer number (6442920).

Almost surely, 2^50216561 is an apocalyptic number.

It is an amenable number.

50216561 is a deficient number, since it is larger than the sum of its proper divisors (1326799).

50216561 is a wasteful number, since it uses less digits than its factorization.

50216561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 50216561 is about 7086.3644416584. The cubic root of 50216561 is about 368.9342621760.

Adding to 50216561 its reverse (16561205), we get a palindrome (66777766).

The spelling of 50216561 in words is "fifty million, two hundred sixteen thousand, five hundred sixty-one".